here's a good one for ya, plant the throttle hits 22 psi then gradually tails off to 13 psi when it hits the limiter any clues why it's doing this as i had a pretty poor reading on the rolling road 244bhp, a year ago (before i put a tubular manifold and boost controller on) i got 245 bhp so i'm a little dissapointed

 

What car you got?

I suggest you need a better or bigger turbo that can hold boost all the way up the rev range. Sounds like you've increased the flow so much with manifold and mods that your turbo can no longer keep up with the demand.

New turbo time matie peeps

 

Depending on what car it is maybe a new activator if it's not holding boost

Cheers,

Jim

 

its an rs focus with 36000 miles on it

 

Go for Primary Designs 330 bhp upgrade of standard turbo, I've just done mine and it now holds boost all the way. See the post marked "finished article". It will cost you about Ł1000 but worth every penny

 

thats great but does everyone have these problems with the boost controller? seems i've spent Ł300 to lose power?

 

I would think it's the actuator mate. Let us know either way

 

Remember the cars ecu limits the boost to 1.3 bar with bluefin anyway.

 

Sounds like a weak actuator to me....

 

Come on!! Same as rob! How good am i?? LOL

 

but surely the boost controller would overcome this, it would be like pulling the pipe off the actuator?? wouldn't it? thus stopping the wastegate from opening

 

yeah sounds like the actuator may be leaking.

I only run max of 19 psi through my boost controller but it holds this all the way to the limiter in every gear. Could you be running too much boost maby and the turbo can't produce it so it slowly backs off.

 

i've tried running it lower boost but it still backs off, ordered a better actuator from woodford there getting back to me on monday, looks a sod to fit though

 

When I sent my turbo to Turbo Dynamics they fitted an uprated 1bar actuator.

 

Shouldn't be the controller, my Blitz peaks at 21psi and only drops 1-2 to the end of the rev range.

 

i must be blaming that cos you can see the graph tail off, probably did it before but didn't notice it

 

mines doing the same russ, i've been keeping an eye on it. goes to 21ish then will drop right off too 12/14. New actuator time i think!

Crowds.

 

maby its the 25psi boost your both running knackering your turbos. mines fine at the mo.

 

oh well! bigger turbo then lol

 

What gain settings you using on your blitz controllers?
If you have it too high it can knacker the actuator and cause the boost to tail off quicker.. Think you could have a dodgey MAF sensor too with only 245Bhp

I have my Gain@15 & Ratio@72 for channel 4 holds 23psi to the redline in 5th gear. 3rd & 4th gear peaks 23psi & holds 21psi to the redline

 

yeh that could be it my gains at about 28 and boost is at 88 lol

 

There's a surprise!!